Analysis of broad emission direction in a spiral-shaped microcavity laser

被引：6
作者：
Kim, Myung-Woon [1 ]
Park, Kyu-Won [1 ]
Yi, Chang-Hwan [1 ]
Kim, Chil-Min [1 ]
机构：
[1] Sogang Univ, Dept Phys, Seoul 121742, South Korea
来源：
OPTICS LETTERS | 2011年 / 36卷 / 23期
基金：
新加坡国家研究基金会;
关键词：
D O I：
10.1364/OL.36.004503
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Broad emission direction with two lobes is analyzed in a spiral-shaped microcavity laser. By pumping the boundary of the InGaAsP semiconductor laser with dc current injection, whispering-gallery-type modes emitting through a notch are obtained. By classifying the lasing modes into mode groups based on the equidistant mode spacing, it is shown that each mode group has its own emission direction with a narrow divergence angle and that a superposition of emission direction of dominant mode groups reproduces a far-field pattern of total intensity with two lobes, which is contrary to theoretical results. (C) 2011 Optical Society of America
引用
收藏
页码：4503 / 4505
页数：3
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